Sremska Mitrovica (, ) is a
city and
municipality located in the
Vojvodina province,
Serbia, on the left bank of the
Sava river. As of 2011 the town had a total population of 41,624, while Sremska Mitrovica administrative area had a population of 79,940 (2011). It is the administrative centre of the
Syrmia District of Serbia.